It’s not the NBA, and Charles Oakley is 53. But the old man still can run his mouth like Charles Barkley is on the receiving end.

The Oakley-coached Killer 3s played Sunday in Dallas against the Ball Hogs in the BIG3 circus, where the Knicks icon and James Dolan antagonist took on his own team’s star: Stephen Jackson.

The longtime NBA journeyman who retired after the 2013-14 season was incensed first by a foul call and then by Oakley pulling him from the game. Jackson and Oakley had a fun back-and-forth that gave a little peek into what an argument with the enforcer actually sounds like.

After Jackson complained about his bench seat — “We ain’t gonna win, not if I’m not out there.” — he threatened to check himself in without Oakley’s permission.